C++ (Cpp) string_view::size示例

示例#1

文件： substr.pass.cpp 项目： 32bitmicro/riscv-libcxx

int main () {
    test ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( "ABCDE");
    test ( "a" );
    test ( "" );

    test ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( L"ABCDE" );
    test ( L"a" );
    test ( L"" );

#if __cplusplus >= 201103L
    test ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( u"ABCDE" );
    test ( u"a" );
    test ( u"" );

    test ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( U"ABCDE" );
    test ( U"a" );
    test ( U"" );
#endif
    
#if _LIBCPP_STD_VER > 11
    {
    constexpr std::experimental::string_view sv1 { "ABCDE", 5 };

    {
    constexpr std::experimental::string_view sv2 = sv1.substr ( 0, 3 );
    static_assert ( sv2.size() == 3, "" );
    static_assert ( sv2[0] == 'A', "" );
    static_assert ( sv2[1] == 'B', "" );
    static_assert ( sv2[2] == 'C', "" );
    }
    
    {
    constexpr std::experimental::string_view sv2 = sv1.substr ( 3, 0 );
    static_assert ( sv2.size() == 0, "" );
    }

    {
    constexpr std::experimental::string_view sv2 = sv1.substr ( 3, 3 );
    static_assert ( sv2.size() == 2, "" );
    static_assert ( sv2[0] == 'D', "" );
    static_assert ( sv2[1] == 'E', "" );
    }
    }
#endif
}

示例#2

文件： substr.pass.cpp 项目： massa/string_view

int main () {
    test ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( "ABCDE");
    test ( "a" );
    test ( "" );

    test ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( L"ABCDE" );
    test ( L"a" );
    test ( L"" );

    test ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( u"ABCDE" );
    test ( u"a" );
    test ( u"" );

    test ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
    test ( U"ABCDE" );
    test ( U"a" );
    test ( U"" );
    
    {
    constexpr std::experimental::string_view sv1 { "ABCDE", 5 };

    {
    constexpr std::experimental::string_view sv2 = sv1.substr ( 0, 3 );
    static_assert ( sv2.size() == 3, "" );
    static_assert ( sv2[0] == 'A', "" );
    static_assert ( sv2[1] == 'B', "" );
    static_assert ( sv2[2] == 'C', "" );
    }
    
    {
    constexpr std::experimental::string_view sv2 = sv1.substr ( 3, 0 );
    static_assert ( sv2.size() == 0, "" );
    }

    {
    constexpr std::experimental::string_view sv2 = sv1.substr ( 3, 3 );
    static_assert ( sv2.size() == 2, "" );
    static_assert ( sv2[0] == 'D', "" );
    static_assert ( sv2[1] == 'E', "" );
    }
    }
    
}

示例#3

文件： Algorithm.hpp 项目： mplucinski/Tial

		static OutputContainer splitted(const std::experimental::string_view &collection, const Element &element) {
			OutputContainer output;
			if(!collection.empty()) {
				unsigned int start = 0, i = 0;
				for(; i != collection.size();) {
					if(collection[i] == element) {
						output.push_back(collection.substr(start, i-start));
						++i;
						start = i;
					} else
						++i;
				}
				output.push_back(collection.substr(start, i));
			}
			return output;
		}

示例#4

文件： percent_encoding.cpp 项目： includeos/uri

std::string uri::encode(const std::experimental::string_view input) {
  static const std::array<char,16> hex =
    {{ '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' }};

  std::string res;
  res.reserve(input.size());

  for (const auto chr : input)
    if (is_unreserved(chr)) {
      res += chr;
    } else {
      res += '%';
      res += hex[ chr >> 4 ];
      res += hex[ chr & 0xf ];
    }

  return res;
}

示例#5

文件： percent_encoding.cpp 项目： includeos/uri

std::string uri::decode(const std::experimental::string_view input) {
  std::string res;
  res.reserve(input.size());
  for (auto it = input.cbegin(), e = input.cend(); it not_eq e; ++it) {
    if (*it == '%') {

      if (++it >= e) return decode_error(std::move(res));
      const uint8_t nibble1 = (*it);

      if (++it >= e) return decode_error(std::move(res));
      const uint8_t nibble2 = (*it);

      res += static_cast<char>(from_hex(nibble1, nibble2));

    } else {
      if (is_reserved(*it) or is_unreserved(*it))
        res += *it;
      else
        return decode_error(std::move(res));
    }
  }
  return res;
}